从 to_tsvector 中选择 * - 连接表

Question

我想设置to_tsvector 语言（例如：'French'），以便在渲染 FTS 向量时使用正确的字典。

表消息有一个locale_id 列，位于locales 表上。然后我需要将 locales 表加入到 locale_id 上的 languages 表中，以获取实际的语言名称。但我得到一个模棱两可的; 错误：

select * from to_tsvector(t3.language, t1.message) 
inner join message as t1 
inner join locales as t2 on (t1.locale_id = t2.id) 
inner join languages as t3 on (t2.language_id = t3.id);

错误：“;”处或附近的语法错误第 1 行：....id)

内连接语言为 t3 on (t2.language_id = t3.id);

Answer 1

较新的代码：

select to_tsvector(t3.language, t1.message) 
from message as t1 
inner join locales as t2 on (t1.locale_id = t2.id) 
inner join languages as t3 on (t2.language_id = t3.id);

原始修复：

select * from to_tsvector(t3.language, t1.message) 
inner join message as t1 on 1 = 1 /* an ON join criteria is mandatory here even if you are doing an implicit cross join */
inner join locales as t2 on (t1.locale_id = t2.id) 
inner join languages as t3 on (t2.language_id = t3.id);